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MCQs

Total Questions : 807 | Page 5 of 81 pages
Question 41. The most practical fuel for a thermonuclear reactor, both from economical and nuclear consideration is
  1.    Plutonium
  2.    Uranium
  3.    Deuterium
  4.    Thorium
 Discuss Question
Answer: Option C. -> Deuterium
Question 42. In nuclear fission each neutron that causes fission releases
  1.    No new neutron
  2.    At least one new neutron
  3.    One new neutron
  4.    More than one new neutron
 Discuss Question
Answer: Option D. -> More than one new neutron
Question 43. The commonly used material for shielding is
  1.    Lead or concrete
  2.    Lead and tin
  3.    Graphite or cadmium
  4.    Thick galvanized sheets
 Discuss Question
Answer: Option A. -> Lead or concrete
Question 44. The material most commonly used for shielding is
  1.    Carbon
  2.    Lead
  3.    Concrete
  4.    All of these
 Discuss Question
Answer: Option C. -> Concrete
Question 45. Which of the following is the heaviest?
  1.    Neutron
  2.    Proton
  3.    Atom
  4.    Electron
 Discuss Question
Answer: Option C. -> Atom
Question 46. Which of the following particles is the lightest?
  1.    Nucleus
  2.    Electron
  3.    Proton
  4.    Meson
 Discuss Question
Answer: Option B. -> Electron
Question 47. A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to
  1.    Slow down the speed of fast moving neutrons
  2.    Control the reaction
  3.    Reduce the temperature
  4.    Extracts heat from nuclear reaction
 Discuss Question
Answer: Option A. -> Slow down the speed of fast moving neutrons
Question 48. The unit of radioactivity is
  1.    Electron volt
  2.    Electron ampere
  3.    Curie
  4.    MV
 Discuss Question
Answer: Option C. -> Curie
Question 49. Reflector in nuclear power plants _________ neutron leakage.
  1.    Increases
  2.    Decreases
  3.    Have no effect on
  4.    None of these
 Discuss Question
Answer: Option B. -> Decreases
Question 50. One gram of uranium will produce energy equivalent to approximately
  1.    1 tonne of high grade coal
  2.    4.5 tonnes of high grade coal
  3.    10 tonnes of high grade coal
  4.    100 tonnes of high grade coal
 Discuss Question
Answer: Option B. -> 4.5 tonnes of high grade coal

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